Chromosome X

DMD. Defects in the dystrophin gene cause Duchenne muscular dystrophy, a fatal progressive degeneration of muscle tissue IMAGE CREDIT: R. Worton, Ottawa General Hospital, Ottawa, CANADA. Adapted for SCIENCE by K. Sutliff. ATP7A. Abnormal Purkinje cell dendrites in the brain of a patient with Menkes disease IMAGE CREDIT: Kevin Roth and Robert Schmidt, Washington University, St. Louis, MO, USA FMR1. An unstable nucleotide repeat is associated with the most common form of mental retardation known as Fragile X syndrome IMAGE CREDIT: Steve Warren, Emory University School of Medicine, Atlanta, GA, USA. ALD. Mylein-stained section of brain in adrenoleukodystrophy, characterized by defective catabolism of long chain fatty acids IMAGE CREDIT: Kevin Roth and Robert Schmidt, Washington University, St. Louis, MO, USA.